The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2014
Filed:
Jun. 04, 2012
Masakazu Egawa, Kanagawa, JP;
Harue Nakashima, Kanagawa, JP;
Sachiko Kawakami, Kanagawa, JP;
Nobuharu Ohsawa, Kanagawa, JP;
Satoshi Seo, Kanagawa, JP;
Ryoji Nomura, Kanagawa, JP;
Masakazu Egawa, Kanagawa, JP;
Harue Nakashima, Kanagawa, JP;
Sachiko Kawakami, Kanagawa, JP;
Nobuharu Ohsawa, Kanagawa, JP;
Satoshi Seo, Kanagawa, JP;
Ryoji Nomura, Kanagawa, JP;
Abstract
The present invention provides a novel substance having an excellent color purity of blue, a light-emitting element and a light-emitting device using the novel substance. A stilbene derivative has a structure shown by the general formula (1). In the general formula (1), Ris hydrogen, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 25 carbon atoms. Ris an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 25 carbon atoms. Each of Rto Ris hydrogen or an alkyl group having 1 to 4 carbon atoms. Aris an aryl group having 6 to 25 carbon atoms.